In simple terms, microservices is an architectural style for building software applications that are designed to be easy to maintain and scale.

In a microservices architecture, an application is divided into a set of small, independent services that communicate with each other using well-defined APIs. Each microservice is responsible for a specific business capability, and can be developed and deployed independently of the other services.

The main advantage of microservices is that they allow teams to work on different parts of an application in parallel, which can speed up development and make it easier to deploy new features. Additionally, because each microservice is independent, it is easier to scale and maintain the application as a whole.

Here is an example of how a microservices architecture might be used to build a e-commerce website:

• A "catalog service" that manages the catalog of products and pricing information
• A "cart service" that handles operations related to the shopping cart, such as adding items to the cart, calculating the total cost, and processing payments
• A "user service" that manages user accounts and authentication
• A "recommendation service" that provides personalized product recommendations to users
• A "review service" that allows users to leave reviews of products
• A "shipping service" that calculates shipping costs and handles the process of fulfilling orders

Each of these services could be developed and deployed independently of the others, and they would communicate with each other using APIs. For example, when a user adds an item to their cart, the cart service would send a request to the catalog service to retrieve the price of the item, and then update the total cost in the cart.